<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div {
            width: 300px;
            height: 300px;
            background: #eee;
            margin: 100px auto;
            padding-top: 30px;
        }

        span {
            width: 250px;
            display: block;
            margin: 30px auto;
        }

        .button {
            width: 100px;
            height: 50px;
            margin-left: 92px;
            background-color: #f00;
            border-radius: 10px;
        }
    </style>
</head>

<body>
    <div>
        <span>账号:<input type="text"></span>
        <span>密码:<input type="password"></span>
        <input type="button" value="登录" class="button">
    </div>
</body>

</html>